Carbureter.



E. M. STEVENSON.

GARBUREIIER. APPLICATION FILED umzo, 1908. RENEWED DBO. 29, 1910.

1,000,451 Patented Aug. 15, 1911.

' c WITNESSES:

. INVENTOR.

6W I Edgar .StevensbnS v 5M BY UNITED STATES PATENT oFF cE.

EDGAR M. STEVENSON, 0F INDIANAPOLIS, INDIANA, ASSIGNOR TO THE CHA'PIN MAN- UFACTURING COMPANY, OF INDIANAPOLIS, INDIANA, CORPO A'IIONI CAR-BURETER.

Specification of Letters Patent. Patented Aug. 15 1911 Application filed January 20, 1908, Serial No. 411,659. Renewed December 29, 1910. Serial No. 600,084.

1' b all whom it may concern:

Be it known that I, EDGAR M. STEVENSON, of Indianapolis, county of Marion, and State of Indiana, have invented a certain new and useful Carbureter; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like :letters refer to like parts.

-The object of this invention is to improve the construction and operation of carbureters.

One feature of the invention consists in combining with the fioat chamber a U- -shapd chamber at the side thereof into the lower portion of which the fuel is adapted to enter from the float chamber and the air is adapted to'enter through one upper end of the U-shaped port-ion and pass down througrthe lower portion of the U-shaped chamber and mix with, the fuel and the resultant gas .pass upwardly through the other end of the U-shaped chamber, and the provision of valves to control the fuel, the

air inlet and thc'gas outlet, and single adjustable. means for controlling the operation i of all of said-valves, whereby they will all operate sin'mltanexmsly and the relative movements of them can be adjusted.

I do not wish to limit the invention to a Ushaped chamber, as it may be V-shape-d or any other substantially U-shape.

The full nature of my invention will be understood from the accompanying drawings and the following description and claim.

In the drawings l igure 1 is a plan view of the carlmreler with the air inlet and gas 'ontlot valves closed. Fig. 2 is a central verlioal section through the carburetor on the line 2 2 of Fig. l, the outlet valve being shown open by dotted lines. Fig. 3 is a vertical transverse section on the line 3-3 of Fig. 1, showing the valves open. Fig.4 is 'a left hand elevation of the device shown in Fig. 3 with the lower part broken away and the altered position of the parts being indicated by dolled lines. Fig. 5 is a. right hand elevation of the device as shown in Fig. 1.;

The device shown in the drawings has a bowl l() or gasolenechamber to which gasolene is supplied from any suitable source through the nipple ll, the inlet.lherelhrough to the float chamber being controlled by the valve 12 which has a float 13 secured to it within the float.chamber.

. substantially U-shaped mixing chamber 15 is secured to one side of the float chamberand into its lower portion the fuelinlet pipe 16 leads from the fioat.chamber. -Said fuel inlet is controlled by the needle valve 17 which is screw mounted in the wallof the mixing chamber 15, see Fig. 2; Thus the fuel entersthe U-shaped mixing chamher about midway of its lower end. The air inlet 20 constitutes one upwardly extending branch of the U-shaped mixing chamberand the gas outlet 21 is the other upwardly exa crank 30 secured to it, from which a eonnecting bar 31 extends to the crank 32 secured on the shaft 26. The crank 32 is slotted for the adjustable connection of the bar 31 by the screw 33, whereby the relative positions of said two valves 22 and'25- may be adjusted, and their relative opening movements be modified. Thus, when the bar 31- is connected with the crank 32 rather close .to the shaft 26 the air; valve 22 will open more slowly than the throttle valve 25.

On the side of the mixing chamber oppo; site the float'chamber a throttle lever 35 is secured to the shaft 26 and also a crank 36 is secured thereto with a connecting rod 37 extending from said crank to a crank 38 on the needle valve 17-. The connection between the bar 37 and the crank 38 is ad justable by the screw39 fitting in a slot in said crank, whereby the operation of the needle valve 17 may be adjusted with reference to the action of the other valves 22 and Thus, if the connection of the bar 37 with the crank 38 is rather close to the needle valve 17, said needle valve will open more rapidly than the other valves. [t is thus seen that I have in this device a practical and successful, form of carl'mrcter, as the air enters through the inlet 20, moves down to the fuel inlet and mingles therewith and forms a gas that moves upwardly through the fuel outlet. Likewise, the single throttle lever tendin branch thereof. The air inlet is float chamber and above it the shaft 23 has i controls and simultaneously operates the air valve, the fuel inlet valve, and the gas outlet valve, establishing a relativity of operation between them.

What I claim as my invention and desire to secure by Letters Patent is In a carhureter the combination of a float chamber, a substantially U-shaped mixing chamber with an upwardly extending air inlet in oneside thereof'and an upwardly extending gas outlet at the other side thereof, a fuel inlet from the float chamber to the lower part of said mixing chamber, a valve for controlling said fuel inlet, a crank mounted externally on said fuel inlet valve, a valve-for controlling the gas outlet mountzed upon. a. shaft -extending thereto, a throt tle lever secured to said shaft, a crank on said gas outlet valve shaft, a bar connecting said cranks, one of said cranks being slotted whereby the connection may be ad ustable, a valve for closing the air inlet, a shaft tially as set forth.

In witness whereof, I have hereunto affixed my signature in the presence of the witnesses herein named.

EDGAR M. STEVENSON. \Vitnesses;

OLIVE BREEDEN,

V. H, Loonwoon. 

